I met a guy who for several years made a living scrapping rusted residential propane tanks in Florida. He torched several holes in each one, the requirement for the scrap yard. He said that on ocasion, one would "flare". A stranger started questioning Him about what He was doing, he said He had been doing it for 10 years [a lie]. The stranger turned out to be the insurance inspector for the scrap yard. He was satisfied with the story, and gave Him the phone #s for several locations that had accumulated a lot of condemed tanks that needed to be procesed.
I would have been suspicious of the story, but He showed Me pictures of the old school bus with the roof cut off and a small crane mounted on it He used to handle the tanks.
SOME GUYS ARE LUCKEY, AT LEAST FOR A WHILE.
A "professional" scrapper was cutting an old [really large] fuel oil tank down the road 2 miles from Our house. It blew up, killing Him. The explosion rattled Our house.
His brother, another "professional" scrapper said in the newspaper article, that the tank must have contained gasoline, because "Oil won't blow."
When I was a kid I was brazing a hole in the oil pan of a friends car while it was on the engine. The vapors went off like a shotgun. I came out from under that car fast as a lightning bolt. I then went back and finished the job "before it got a fresh load of air". I was luckey enough not to get hurt.
I no longer have the casual attitude of My youth.